Whilst we appear to be in vinyl mode.. One glass of wine too many....and... ..just won an old (1980) LP12 with Rega R200 arm (?) on eBay. It seemed V cheap so it's probably a duffer..but then again..maybe not.. got an un-named AT cartridge. What do I do now? How do I know if it's OK or not? Take it to a dealer for a service? Any recommendations for a decent cartridge? And there I was just about to tear my Dual to bits...